当前位置：首页 > 新闻中心> 行业新闻
行业新闻

CXLE8129 step-up converter designed for driving up to 7 series whiteLEDs from a single cell Lithium lon batle . CXLE8129 uses current mode， fixed frequency architecture to regulate an LED

1.产品概述         2.产品特点
3.应用范围       4.下载产品资料PDF文档
5.产品封装图                     6.电路原理图
7.功能概述       8.相关产品

一,产品概述(General Description)

The CXLE8129 is a step-up converter designed for driving up to 7 series whiteLEDs from a single cell Lithium lon batle . The CXLE8129 uses current mode， fixed frequency architecture to regulate an LED hich is measured through an external current sense resistor. Its low 200mV feedback voltage reduces power loss and improves efficiency

The CXLE8129 includes under-voltage lockout，current limiting and thermal overload protectionpreventing damage in the event of an output overload.Optimized operation frequency can meet the requirement of small LC filters value and operation current with high efficiency. Internal soft start function can reduce the inrush curren . Tiny package type provide the best solution for PCB space saving and total BOM co

二.产品特点(Features)
1.)High Efficiency: Up to 90%
2.)1.2MHz Constant Frequency Operation
3.)Integrated internal Power MOSFET
4.)Drives up to 7 Series WLEDs
5.)Low 200mV Feedback Voltage
6.)Soft-start/Dimming with wide Frequency Range
7.)UVLO, Thermal Shutdown
8.)Internal Current limit
9.)Over Voltage Protection
10.)Small LC Filter
11.)Minimize the External Component
12.)<1μA Shutdown Current
13.)SOT23-6 Package
三,应用范围 (Applications)
Camera Flash White LED
Mobile Phone, Smart Phone LED Backlight

PDA LED Backlight
Digital Still Cameras

Camcorder
四.下载产品资料PDF文档

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

QQ截图20160419174301.jpg

五,产品封装图 (Package)

Pin Name	Pin Number	Description
SW	1	Inductor Connection. Connect to the switched side of the external inductor as well as the anode of the external diode. SW is high impedance during shutdown.
GND	2	Ground Pin.
FB	3	Current-Sense Feedback Input. Connect a resistor from FB to GND to set the LED current: I LED=0.2V/R CS
EN	4	Enable and LED Brightness Control Input. Pull high to turn on IC.Drive EN with a 20kHz to 1MHz unfiltered PWM dimming signal for DC LED current that is proportional to the signal’s duty cycle.
OV	5	Over Voltage Input. The CXLE8129 turn off the N-channel MOSFET when VUT exceeds 28V .Connect OV to the output at the top of the LED string.
VIN	6	Power Supply Input. Must be closely decoupled to GND with a 1μF or greater ceramic capacitor.

六.电路原理图

七,功能概述

PARAMETER	CONDITIONS	MIN	TYP	MAX	UNIT
Operating Input Voltage		3		24	V
Under Voltage Lockout				2.6	V
Under Voltage Lockout Hysteresis			100		mV
Current (Shutdown)	V EN<0.4V			1	μA
Quiescent Current	V FB=0.15V，No switching		200		μA
Supply Current	V FB=0V，switching		0.6	1	mA
Regulated Feedback Voltage		194	200	206	mV
Switching Frequency			1.2		MHz
ON Resistance of NMOS			0.1		Ω
Peak Current Limit	V IN= 4.2V,Duty cycle=50%	2			A
EN Shutdown Voltage				0.4	V
EN Enable Voltage		1.5			V
EN Leakage Current			±0.01	±1.0	μA
OVP Threshold	Open LED,V OUT Rising		28		V

八,相关产品更多同类产品.......

白灯背光驱动IC>>>小屏白灯背光驱动IC
型号	工作模式	工作电压范围	过压保护电压	反馈电压	开关电流限制	效率	静态电流	工作频率	调光形式	调光频率范围	封装
CXLE8121	PWM	2.5V-10V	29V	0.1V	320mA	85%	0.1uA	1.3MHz	PWM		SOT-25
CXLE8122	PWM	2.2V-6.0V	17V	0.25V	400mA	82%	3mA	1.4MHz	PWM	100Hz-1KHz	SOT-26
白灯背光驱动IC>>>大中屏白灯背光驱动IC
型号	工作模式	工作电压范围	过压保护电压	反馈电压	开关电流限制	效率	静态电流	工作频率	调光形式	调光频率范围	封装
CXLE8123	PWM	2.2V-6.0V	17V	0.25V	700mA	82%	3mA	1.4MHz	PWM	100Hz-1KHz	SOT-26
CXLE8124	PWM	2.5V-6.0V	23V	0.25V	1.0A	88%	0.4mA	1.0MHz	PWM	100Hz-10KHz	SOT-26
CXLE8125	PWM	2.5V-6.0V	30V	0.104V	400mA	87%	0.2mA	1.2MHz	PWM	小于1KHz	SOT-26
CXLE8125B	PWM	2.7V-6.0V	38V	0.2V	1A	91%	5uA	0.8MHz	PWM		SOT-26
CXLE8127	PWM	2.7V-6.0V	37V	0.3V	900mA	90%	0.28mA	0.9MHz	PWM	100Hz-200KHz	SOT-26
CXLE8128A/B/C	PWM	2.5V-6.0V	28V	0.1V/0.25V /0.3V	1.5A	90%	0.1uA	1.2MHz	PWM	20KHz-1MHz	SOT-26
CXLE8129	PWM	3.0V-25V	28V	0.2V	2A	90%	1uA	1.2MHz	PWM	20KHz-1MHz	SOT-26
CXLE8129B	PWM	2.7V-6.5V	22V	0.2V	2.8A	95%	5uA	1MHz	PWM		SOT-26
CXLE8131	PWM	3.0V-6.0V	24V	0.2V	2.5A	88%	1uA	1.2MHz	PWM	10KHz-100KHz	SOT-26
白灯背光驱动IC>>>超大屏白灯背光驱动IC
型号	工作模式	工作电压范围	过压保护电压	反馈电压	开关电流限制	效率	静态电流	工作频率	调光形式	调光频率范围	封装
CXLE8113	PWM	2.2V-6V	26V	0.2V	3A		100uA	800KHz	PWM		SOP-8
CXLE8114	PWM	2.2V-6V	27V	0.2V	3A		100uA	800KHz	PWM		DFN3*3-8
CXLE8115	PWM	10V-35V	200V	0.2V	扩流		400uA	200KHz	PWM		SOP-8
CXLE8116	PWM	3.6V-26V	32V	0.22V	2A	92%		400KHz	PWM		SOP-8
CXLE8117	PWM	3.6V-26V	60V	0.22V	2A	92%		400KHz	PWM		SOP-8
CXLE8117B	PWM	5.0V-45V	60V	0.22V	2A	93%		400KHz	PWM		SOP-8
CXLE8119	PWM	3.6V-36V	60V	0.22V	4A	94%		180KHz	PWM		TO252-5L
CXLE8120	PWM	5.0V-36V	60V	0.22V	5A	94%		180KHz	PWM		TO263-5L
白灯背光驱动IC>>>同步升压白灯背光驱动IC
型号	工作模式	工作电压范围	过压保护电压	反馈电压	开关电流限制	效率	静态电流	工作频率	调光形式	调光频率范围	封装
CXLE8132	PWM	2.7V-16V	36V	0.2V	340mA	81%	3.2uA	1.2MHz	PWM		SOT-26

本文链接:http://www.jtm-ic.com/aspcms/news/2016-2-4/2240.html

关注:电子行业精彩资讯，关注嘉泰姆资讯官方微信，精华内容抢鲜读，关注方法：添加好友→搜索“嘉泰姆电子元件”→关注或微信“扫一扫”二维码官方微信(图片点击可放大)

点击次数：176 更新时间：2016/2/4 9:55:39 【打印此页】【关闭】

上一条：CXLE8128A/B/C step-up converter designed for driving up to 7 series white LEDs from a single cell Lithium lon battery . CXLE8128A/B/C uses current mode， fixed frequency architecture to regulate 下一条：CXLB7284A集成开关式单节、双节锂电池充电管理芯片,采用电压模 BUCK 的拓扑结构，最大充电电流达到2A. 通过恒压控制环（CV）和恒流控制环（CC）来调整锂电池充电电压和恒流充电电流 . 同时，还集成温度保护、最大充电时间限制、输出短路等保护功能，通过 NTC 检测电池温度，可以实现电池过热保护功能，两个 LED 指示灯指示电池充电状态.